Query Processing in Distributed Data Sites

The distributed queries in the centralized setting and addressed data operation over web databases where different dimensions are stored in different data sites.Their algorithm first retrieves values in every dimension from remote data sites using sorted access in round-robin on all dimensions. This continues until all dimension values of an object called the terminating object have been retrieved. The wired large-scale distributed environment is also different from this work in a MANET setting. Proposed a feedback-based distributed skyline (FDS) algorithm within a network setting similar as ours. However FDS only deals with skyline queries without any constraints that are considered in our work. Also FDS is focused on minimizing the network bandwidth use and therefore it uses a multiple-round feedback mechanism to prune the unqualified skyline candidates.